- 17 Sep, 2020 22 commits
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Mohan Kumar authored
[ Upstream commit 216116ea ] The Tegra HDA codec HW implementation has an issue related to not swapping the 2 channel Audio Sample Packet(ASP) channel mapping. Whatever the FL and FR mapping specified the left channel always comes out of left speaker and right channel on right speaker. So add condition to disallow the swapping of FL,FR during the playback. Signed-off-by:
Mohan Kumar <mkumard@nvidia.com> Acked-by:
Sameer Pujar <spujar@nvidia.com> Link: https://lore.kernel.org/r/20200825052415.20626-2-mkumard@nvidia.comSigned-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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Dinghao Liu authored
[ Upstream commit 15ac5cda ] When make_rate() fails, vcc should be freed just like other error paths in fs_open(). Signed-off-by:
Dinghao Liu <dinghao.liu@zju.edu.cn> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Dinghao Liu authored
[ Upstream commit f97c04c3 ] When down_killable() fails, skb_resp should be freed just like when st95hf_spi_send() fails. Signed-off-by:
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Xie He authored
[ Upstream commit 1ee39c14 ] The underlying Ethernet device may request necessary tailroom to be allocated by setting needed_tailroom. This driver should also set needed_tailroom to request the tailroom needed by the underlying Ethernet device to be allocated. Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com> Cc: Martin Schiller <ms@dev.tdt.de> Signed-off-by:
Xie He <xie.he.0141@gmail.com> Signed-off-by:
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Florian Westphal authored
[ Upstream commit cc5453a5 ] If an sctp connection gets re-used, heartbeats are flagged as invalid because their vtag doesn't match. Handle this in a similar way as TCP conntrack when it suspects that the endpoints and conntrack are out-of-sync. When a HEARTBEAT request fails its vtag validation, flag this in the conntrack state and accept the packet. When a HEARTBEAT_ACK is received with an invalid vtag in the reverse direction after we allowed such a HEARTBEAT through, assume we are out-of-sync and re-set the vtag info. v2: remove left-over snippet from an older incarnation that moved new_state/old_state assignments, thats not needed so keep that as-is. Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Hanjun Guo authored
[ Upstream commit 7eb48dd0 ] The acpi_get_table() should be coupled with acpi_put_table() if the mapped table is not used at runtime to release the table mapping, put the CSRT table buf after using it. Signed-off-by:
Hanjun Guo <guohanjun@huawei.com> Link: https://lore.kernel.org/r/1595411661-15936-1-git-send-email-guohanjun@huawei.comSigned-off-by:
Vinod Koul <vkoul@kernel.org> Signed-off-by:
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Vineet Gupta authored
[ Upstream commit fe81d927 ] Newer version of HSDK aka HSDK-4xD (with dual issue HS48x4 CPU) wired up the perf interrupt, so enable that in DT. This is OK for old HSDK where this irq is ignored because pct irq is not wired up in hardware. Signed-off-by:
Vineet Gupta <vgupta@synopsys.com> Signed-off-by:
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Florian Fainelli authored
[ Upstream commit 686e0a0c ] The string was incorrectly defined before from least to most specific, swap the compatible strings accordingly. Fixes: ff73917d ("ARM64: dts: Add QSPI Device Tree node for NS2") Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Florian Fainelli authored
[ Upstream commit b793dab8 ] The string was incorrectly defined before from least to most specific, swap the compatible strings accordingly. Fixes: 1c8f4065 ("ARM: dts: BCM5301X: convert to iProc QSPI") Signed-off-by:
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Florian Fainelli authored
[ Upstream commit d1ecc40a ] The string was incorrectly defined before from least to most specific, swap the compatible strings accordingly. Fixes: 329f98c1 ("ARM: dts: NSP: Add QSPI nodes to NSPI and bcm958625k DTSes") Signed-off-by:
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Florian Fainelli authored
[ Upstream commit d6631862 ] The string was incorrectly defined before from least to most specific, swap the compatible strings accordingly. Fixes: b9099ec7 ("ARM: dts: Add Broadcom Hurricane 2 DTS include file") Signed-off-by:
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Douglas Anderson authored
[ Upstream commit 9d5dcefb ] As the comments in this patch say, if we tune and find all phases are valid it's _almost_ as bad as no phases being found valid. Probably all phases are not really reliable but we didn't detect where the unreliable place is. That means we'll essentially be guessing and hoping we get a good phase. This is not just a problem in theory. It was causing real problems on a real board. On that board, most often phase 10 is found as the only invalid phase, though sometimes 10 and 11 are invalid and sometimes just 11. Some percentage of the time, however, all phases are found to be valid. When this happens, the current logic will decide to use phase 11. Since phase 11 is sometimes found to be invalid, this is a bad choice. Sure enough, when phase 11 is picked we often get mmc errors later in boot. I have seen cases where all phases were found to be valid 3 times in a row, so increase the retry count to 10 just to be extra sure. Fixes: 415b5a75 ("mmc: sdhci-msm: Add platform_execute_tuning implementation") Signed-off-by:
Douglas Anderson <dianders@chromium.org> Reviewed-by:
Veerabhadrarao Badiganti <vbadigan@codeaurora.org> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20200827075809.1.If179abf5ecb67c963494db79c3bc4247d987419b@changeidSigned-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Kamal Heib authored
[ Upstream commit 28b08657 ] When the returned speed from __ethtool_get_link_ksettings() is SPEED_UNKNOWN this will lead to reporting a wrong speed and width for providers that uses ib_get_eth_speed(), fix that by defaulting the netdev_speed to SPEED_1000 in case the returned value from __ethtool_get_link_ksettings() is SPEED_UNKNOWN. Fixes: d4186194 ("IB/core: Add generic function to extract IB speed from netdev") Link: https://lore.kernel.org/r/20200902124304.170912-1-kamalheib1@gmail.comSigned-off-by:
Kamal Heib <kamalheib1@gmail.com> Signed-off-by:
Jason Gunthorpe <jgg@nvidia.com> Signed-off-by:
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Luo Jiaxing authored
[ Upstream commit 53de092f ] It was discovered that sdparm will fail when attempting to disable write cache on a SATA disk connected via libsas. In the ATA command set the write cache state is controlled through the SET FEATURES operation. This is roughly corresponds to MODE SELECT in SCSI and the latter command is what is used in the SCSI-ATA translation layer. A subtle difference is that a MODE SELECT carries data whereas SET FEATURES is defined as a non-data command in ATA. Set the DMA data direction to DMA_NONE if the requested ATA command is identified as non-data. [mkp: commit desc] Fixes: fa1c1e8f ("[SCSI] Add SATA support to libsas") Link: https://lore.kernel.org/r/1598426666-54544-1-git-send-email-luojiaxing@huawei.comReviewed-by:
John Garry <john.garry@huawei.com> Reviewed-by:
Jason Yan <yanaijie@huawei.com> Signed-off-by:
Luo Jiaxing <luojiaxing@huawei.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Ondrej Jirman authored
[ Upstream commit fd90e380 ] It's writing too much data. regmap_bulk_write expects number of register sized chunks to write, not a byte sized length of the bounce buffer. Bounce buffer needs to be padded too, so that regmap_bulk_write will not read past the end of the buffer. Fixes: 133add5b ("drm/sun4i: Add Allwinner A31 MIPI-DSI controller support") Signed-off-by:
Ondrej Jirman <megous@megous.com> Signed-off-by:
Maxime Ripard <maxime@cerno.tech> Reviewed-by:
Jernej Skrabec <jernej.skrabec@siol.net> Link: https://patchwork.freedesktop.org/patch/msgid/20200828125032.937148-1-megous@megous.comSigned-off-by:
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Selvin Xavier authored
[ Upstream commit 2d0e60ee ] QP1 Rx CQE reports transparent VLAN ID in the completion and this is used while reporting the completion for received MAD packet. Check if the vlan id is configured before reporting it in the work completion. Fixes: 84511455 ("RDMA/bnxt_re: report vlan_id and sl in qp1 recv completion") Link: https://lore.kernel.org/r/1598292876-26529-3-git-send-email-selvin.xavier@broadcom.comSigned-off-by:
Selvin Xavier <selvin.xavier@broadcom.com> Signed-off-by:
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Kamal Heib authored
[ Upstream commit 6112ef62 ] Both pkey_tbl_len and gid_tbl_len are set in rxe_init_port_param() - so no need to check if they aren't set. Fixes: 8700e3e7 ("Soft RoCE driver") Link: https://lore.kernel.org/r/20200705104313.283034-2-kamalheib1@gmail.comSigned-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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Dinghao Liu authored
[ Upstream commit e3ddd606 ] When page_address() fails, umem should be freed just like when rxe_mem_alloc() fails. Fixes: 8700e3e7 ("Soft RoCE driver") Link: https://lore.kernel.org/r/20200819075632.22285-1-dinghao.liu@zju.edu.cnSigned-off-by:
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Matthias Schiffer authored
[ Upstream commit 81dbbb41 ] According to the Reference Manual, the correct size is 512 MiB. Without this fix, probing the QSPI fails: fsl-quadspi 1550000.spi: ioremap failed for resource [mem 0x40000000-0x7fffffff] fsl-quadspi 1550000.spi: Freescale QuadSPI probe failed fsl-quadspi: probe of 1550000.spi failed with error -12 Fixes: 85f8ee78 ("ARM: dts: ls1021a: Add support for QSPI with ls1021a SoC") Signed-off-by:
Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Signed-off-by:
Shawn Guo <shawnguo@kernel.org> Signed-off-by:
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Dinh Nguyen authored
[ Upstream commit 0ff5a481 ] Fixes the register address for the timer3 entry on Arria10. Fixes: 475dc86d ("arm: dts: socfpga: Add a base DTSI for Altera's Arria10 SOC") Signed-off-by:
Dinh Nguyen <dinguyen@kernel.org> Signed-off-by:
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Adam Ford authored
[ Upstream commit 4d26e9a0 ] Older versions of U-Boot would pinmux the whole board, but as the bootloader got updated, it started to only pinmux the pins it needed, and expected Linux to configure what it needed. Unfortunately this caused an issue with the audio, because the mcbsp2 pins were configured in the device tree but never referenced by the driver. When U-Boot stopped muxing the audio pins, the audio died. This patch adds the references to the associate the pin controller with the mcbsp2 driver which makes audio operate again. Fixes: 5cb8b0fa ("ARM: dts: Move most of logicpd-som-lv-37xx-devkit.dts to logicpd-som-lv-baseboard.dtsi") Signed-off-by:
Adam Ford <aford173@gmail.com> Signed-off-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
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Adam Ford authored
[ Upstream commit d7dfee67 ] Older versions of U-Boot would pinmux the whole board, but as the bootloader got updated, it started to only pinmux the pins it needed, and expected Linux to configure what it needed. Unfortunately this caused an issue with the audio, because the mcbsp2 pins were configured in the device tree, they were never referenced by the driver. When U-Boot stopped muxing the audio pins, the audio died. This patch adds the references to the associate the pin controller with the mcbsp2 driver which makes audio operate again. Fixes: 739f85bb ("ARM: dts: Move most of logicpd-torpedo-37xx-devkit to logicpd-torpedo-baseboard") Signed-off-by:
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- 12 Sep, 2020 9 commits
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Greg Kroah-Hartman authored
Tested-by:
Jon Hunter <jonathanh@nvidia.com> Tested-by:
Shuah Khan <skhan@linuxfoundation.org> Tested-by:
Guenter Roeck <linux@roeck-us.net> Tested-by:
Linux Kernel Functional Testing <lkft@linaro.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Roi Dayan authored
Support for phys switch id ndo added for representors and if we do not have representors there is no need to support it. Since each port return different switch id supporting this block support for creating bond over PFs and attaching to bridge in legacy mode. This bug doesn't exist upstream as the code got refactored and the netdev api is totally different. Fixes: cb67b832 ("net/mlx5e: Introduce SRIOV VF representors") Signed-off-by:
Roi Dayan <roid@mellanox.com> Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
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Jakub Kicinski authored
[ Upstream commit 96e97bc0 ] napi_disable() makes sure to set the NAPI_STATE_NPSVC bit to prevent netpoll from accessing rings before init is complete. However, the same is not done for fresh napi instances in netif_napi_add(), even though we expect NAPI instances to be added as disabled. This causes crashes during driver reconfiguration (enabling XDP, changing the channel count) - if there is any printk() after netif_napi_add() but before napi_enable(). To ensure memory ordering is correct we need to use RCU accessors. Reported-by:
Rob Sherwood <rsher@fb.com> Fixes: 2d8bff12 ("netpoll: Close race condition between poll_one_napi and napi_disable") Signed-off-by:
Jakub Kicinski <kuba@kernel.org> Signed-off-by:
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Tetsuo Handa authored
[ Upstream commit 2a63866c ] syzbot is reporting hung task at nbd_ioctl() [1], for there are two problems regarding TIPC's connectionless socket's shutdown() operation. ---------- #include <fcntl.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <linux/nbd.h> #include <unistd.h> int main(int argc, char *argv[]) { const int fd = open("/dev/nbd0", 3); alarm(5); ioctl(fd, NBD_SET_SOCK, socket(PF_TIPC, SOCK_DGRAM, 0)); ioctl(fd, NBD_DO_IT, 0); /* To be interrupted by SIGALRM. */ return 0; } ---------- One problem is that wait_for_completion() from flush_workqueue() from nbd_start_device_ioctl() from nbd_ioctl() cannot be completed when nbd_start_device_ioctl() received a signal at wait_event_interruptible(), for tipc_shutdown() from kernel_sock_shutdown(SHUT_RDWR) from nbd_mark_nsock_dead() from sock_shutdown() from nbd_start_device_ioctl() is failing to wake up a WQ thread sleeping at wait_woken() from tipc_wait_for_rcvmsg() from sock_recvmsg() from sock_xmit() from nbd_read_stat() from recv_work() scheduled by nbd_start_device() from nbd_start_device_ioctl(). Fix this problem by always invoking sk->sk_state_change() (like inet_shutdown() does) when tipc_shutdown() is called. The other problem is that tipc_wait_for_rcvmsg() cannot return when tipc_shutdown() is called, for tipc_shutdown() sets sk->sk_shutdown to SEND_SHUTDOWN (despite "how" is SHUT_RDWR) while tipc_wait_for_rcvmsg() needs sk->sk_shutdown set to RCV_SHUTDOWN or SHUTDOWN_MASK. Fix this problem by setting sk->sk_shutdown to SHUTDOWN_MASK (like inet_shutdown() does) when the socket is connectionless. [1] https://syzkaller.appspot.com/bug?id=3fe51d307c1f0a845485cf1798aa059d12bf18b2Reported-by:
syzbot <syzbot+e36f41d207137b5d12f7@syzkaller.appspotmail.com> Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by:
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Xin Long authored
[ Upstream commit 3106ecb4 ] With disabling bh in the whole sctp_get_port_local(), when snum == 0 and too many ports have been used, the do-while loop will take the cpu for a long time and cause cpu stuck: [ ] watchdog: BUG: soft lockup - CPU#11 stuck for 22s! [ ] RIP: 0010:native_queued_spin_lock_slowpath+0x4de/0x940 [ ] Call Trace: [ ] _raw_spin_lock+0xc1/0xd0 [ ] sctp_get_port_local+0x527/0x650 [sctp] [ ] sctp_do_bind+0x208/0x5e0 [sctp] [ ] sctp_autobind+0x165/0x1e0 [sctp] [ ] sctp_connect_new_asoc+0x355/0x480 [sctp] [ ] __sctp_connect+0x360/0xb10 [sctp] There's no need to disable bh in the whole function of sctp_get_port_local. So fix this cpu stuck by removing local_bh_disable() called at the beginning, and using spin_lock_bh() instead. The same thing was actually done for inet_csk_get_port() in Commit ea8add2b ("tcp/dccp: better use of ephemeral ports in bind()"). Thanks to Marcelo for pointing the buggy code out. v1->v2: - use cond_resched() to yield cpu to other tasks if needed, as Eric noticed. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Reported-by:
Ying Xu <yinxu@redhat.com> Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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Kamil Lorenc authored
[ Upstream commit a609d025 ] Keenetic Plus DSL is a xDSL modem that uses dm9620 as its USB interface. Signed-off-by:
Kamil Lorenc <kamil@re-ws.pl> Signed-off-by:
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Paul Moore authored
[ Upstream commit d3b990b7 ] This patch fixes two main problems seen when removing NetLabel mappings: memory leaks and potentially extra audit noise. The memory leaks are caused by not properly free'ing the mapping's address selector struct when free'ing the entire entry as well as not properly cleaning up a temporary mapping entry when adding new address selectors to an existing entry. This patch fixes both these problems such that kmemleak reports no NetLabel associated leaks after running the SELinux test suite. The potentially extra audit noise was caused by the auditing code in netlbl_domhsh_remove_entry() being called regardless of the entry's validity. If another thread had already marked the entry as invalid, but not removed/free'd it from the list of mappings, then it was possible that an additional mapping removal audit record would be generated. This patch fixes this by returning early from the removal function when the entry was previously marked invalid. This change also had the side benefit of improving the code by decreasing the indentation level of large chunk of code by one (accounting for most of the diffstat). Fixes: 63c41688 ("netlabel: Add network address selectors to the NetLabel/LSM domain mapping") Reported-by:
Stephen Smalley <stephen.smalley.work@gmail.com> Signed-off-by:
Paul Moore <paul@paul-moore.com> Signed-off-by:
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Jens Axboe authored
[ Upstream commit de1b0ee4 ] If a driver leaves the limit settings as the defaults, then we don't initialize bdi->io_pages. This means that file systems may need to work around bdi->io_pages == 0, which is somewhat messy. Initialize the default value just like we do for ->ra_pages. Cc: stable@vger.kernel.org Fixes: 9491ae4a ("mm: don't cap request size based on read-ahead setting") Reported-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Takashi Sakamoto authored
Tascam FE-8 is known to support communication by asynchronous transaction only. The support can be implemented in userspace application and snd-firewire-ctl-services project has the support. However, ALSA firewire-tascam driver is bound to the model. This commit changes device entries so that the model is excluded. In a commit 53b3ffee ("ALSA: firewire-tascam: change device probing processing"), I addressed to the concern that version field in configuration differs depending on installed firmware. However, as long as I checked, the version number is fixed. It's safe to return version number back to modalias. Fixes: 53b3ffee ("ALSA: firewire-tascam: change device probing processing") Cc: <stable@vger.kernel.org> # 4.4+ Signed-off-by:
Takashi Sakamoto <o-takashi@sakamocchi.jp> Link: https://lore.kernel.org/r/20200823075537.56255-1-o-takashi@sakamocchi.jpSigned-off-by:
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- 09 Sep, 2020 9 commits
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Greg Kroah-Hartman authored
Tested-by:
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Himadri Pandya authored
commit a092b723 upstream. The buffer size is 2 Bytes and we expect to receive the same amount of data. But sometimes we receive less data and run into uninit-was-stored issue upon read. Hence modify the error check on the return value to match with the buffer size as a prevention. Reported-and-tested by: syzbot+a7e220df5a81d1ab400e@syzkaller.appspotmail.com Signed-off-by:
Himadri Pandya <himadrispandya@gmail.com> Signed-off-by:
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Johannes Berg authored
commit 47caf685 upstream. Reject invalid hints early in order to not cause a kernel WARN later if they're restored to or similar. Reported-by: syzbot+d451401ffd00a60677ee@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=d451401ffd00a60677ee Link: https://lore.kernel.org/r/20200819084648.13956-1-johannes@sipsolutions.netSigned-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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Muchun Song authored
commit 17743798 upstream. There is a race between the assignment of `table->data` and write value to the pointer of `table->data` in the __do_proc_doulongvec_minmax() on the other thread. CPU0: CPU1: proc_sys_write hugetlb_sysctl_handler proc_sys_call_handler hugetlb_sysctl_handler_common hugetlb_sysctl_handler table->data = &tmp; hugetlb_sysctl_handler_common table->data = &tmp; proc_doulongvec_minmax do_proc_doulongvec_minmax sysctl_head_finish __do_proc_doulongvec_minmax unuse_table i = table->data; *i = val; // corrupt CPU1's stack Fix this by duplicating the `table`, and only update the duplicate of it. And introduce a helper of proc_hugetlb_doulongvec_minmax() to simplify the code. The following oops was seen: BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page Code: Bad RIP value. ... Call Trace: ? set_max_huge_pages+0x3da/0x4f0 ? alloc_pool_huge_page+0x150/0x150 ? proc_doulongvec_minmax+0x46/0x60 ? hugetlb_sysctl_handler_common+0x1c7/0x200 ? nr_hugepages_store+0x20/0x20 ? copy_fd_bitmaps+0x170/0x170 ? hugetlb_sysctl_handler+0x1e/0x20 ? proc_sys_call_handler+0x2f1/0x300 ? unregister_sysctl_table+0xb0/0xb0 ? __fd_install+0x78/0x100 ? proc_sys_write+0x14/0x20 ? __vfs_write+0x4d/0x90 ? vfs_write+0xef/0x240 ? ksys_write+0xc0/0x160 ? __ia32_sys_read+0x50/0x50 ? __close_fd+0x129/0x150 ? __x64_sys_write+0x43/0x50 ? do_syscall_64+0x6c/0x200 ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fixes: e5ff2159 ("hugetlb: multiple hstates for multiple page sizes") Signed-off-by:
Muchun Song <songmuchun@bytedance.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Reviewed-by:
Mike Kravetz <mike.kravetz@oracle.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20200828031146.43035-1-songmuchun@bytedance.comSigned-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Mrinal Pandey authored
commit 13e45417 upstream. The usage of "capture group (...)" in the immediate condition after `&&` results in `$1` being uninitialized. This issues a warning "Use of uninitialized value $1 in regexp compilation at ./scripts/checkpatch.pl line 2638". I noticed this bug while running checkpatch on the set of commits from v5.7 to v5.8-rc1 of the kernel on the commits with a diff content in their commit message. This bug was introduced in the script by commit e518e9a5 ("checkpatch: emit an error when there's a diff in a changelog"). It has been in the script since then. The author intended to store the match made by capture group in variable `$1`. This should have contained the name of the file as `[\w/]+` matched. However, this couldn't be accomplished due to usage of capture group and `$1` in the same regular expression. Fix this by placing the capture group in the condition before `&&`. Thus, `$1` can be initialized to the text that capture group matches thereby setting it to the desired and required value. Fixes: e518e9a5 ("checkpatch: emit an error when there's a diff in a changelog") Signed-off-by:
Mrinal Pandey <mrinalmni@gmail.com> Signed-off-by:
Lukas Bulwahn <lukas.bulwahn@gmail.com> Reviewed-by:
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Alex Williamson authored
commit ebfa440c upstream. SR-IOV VFs do not implement the memory enable bit of the command register, therefore this bit is not set in config space after pci_enable_device(). This leads to an unintended difference between PF and VF in hand-off state to the user. We can correct this by setting the initial value of the memory enable bit in our virtualized config space. There's really no need however to ever fault a user on a VF though as this would only indicate an error in the user's management of the enable bit, versus a PF where the same access could trigger hardware faults. Fixes: abafbc55 ("vfio-pci: Invalidate mmaps and block MMIO access on disabled memory") Signed-off-by:
Alex Williamson <alex.williamson@redhat.com> Signed-off-by:
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James Morse authored
commit 71a7f8cb upstream. AT instructions do a translation table walk and return the result, or the fault in PAR_EL1. KVM uses these to find the IPA when the value is not provided by the CPU in HPFAR_EL1. If a translation table walk causes an external abort it is taken as an exception, even if it was due to an AT instruction. (DDI0487F.a's D5.2.11 "Synchronous faults generated by address translation instructions") While we previously made KVM resilient to exceptions taken due to AT instructions, the device access causes mismatched attributes, and may occur speculatively. Prevent this, by forbidding a walk through memory described as device at stage2. Now such AT instructions will report a stage2 fault. Such a fault will cause KVM to restart the guest. If the AT instructions always walk the page tables, but guest execution uses the translation cached in the TLB, the guest can't make forward progress until the TLB entry is evicted. This isn't a problem, as since commit 5dcd0fdb ("KVM: arm64: Defer guest entry when an asynchronous exception is pending"), KVM will return to the host to process IRQs allowing the rest of the system to keep running. Cc: stable@vger.kernel.org # v4.19 Signed-off-by:
James Morse <james.morse@arm.com> Reviewed-by:
Marc Zyngier <maz@kernel.org> Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
Andre Przywara <andre.przywara@arm.com> Signed-off-by:
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James Morse authored
commit 88a84ccc upstream. KVM doesn't expect any synchronous exceptions when executing, any such exception leads to a panic(). AT instructions access the guest page tables, and can cause a synchronous external abort to be taken. The arm-arm is unclear on what should happen if the guest has configured the hardware update of the access-flag, and a memory type in TCR_EL1 that does not support atomic operations. B2.2.6 "Possible implementation restrictions on using atomic instructions" from DDI0487F.a lists synchronous external abort as a possible behaviour of atomic instructions that target memory that isn't writeback cacheable, but the page table walker may behave differently. Make KVM robust to synchronous exceptions caused by AT instructions. Add a get_user() style helper for AT instructions that returns -EFAULT if an exception was generated. While KVM's version of the exception table mixes synchronous and asynchronous exceptions, only one of these can occur at each location. Re-enter the guest when the AT instructions take an exception on the assumption the guest will take the same exception. This isn't guaranteed to make forward progress, as the AT instructions may always walk the page tables, but guest execution may use the translation cached in the TLB. This isn't a problem, as since commit 5dcd0fdb ("KVM: arm64: Defer guest entry when an asynchronous exception is pending"), KVM will return to the host to process IRQs allowing the rest of the system to keep running. Cc: stable@vger.kernel.org # v4.19 Signed-off-by:
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James Morse authored
commit 5dcd0fdb upstream. SError that occur during world-switch's entry to the guest will be accounted to the guest, as the exception is masked until we enter the guest... but we want to attribute the SError as precisely as possible. Reading DISR_EL1 before guest entry requires free registers, and using ESB+DISR_EL1 to consume and read back the ESR would leave KVM holding a host SError... We would rather leave the SError pending and let the host take it once we exit world-switch. To do this, we need to defer guest-entry if an SError is pending. Read the ISR to see if SError (or an IRQ) is pending. If so fake an exit. Place this check between __guest_enter()'s save of the host registers, and restore of the guest's. SError that occur between here and the eret into the guest must have affected the guest's registers, which we can naturally attribute to the guest. The dsb is needed to ensure any previous writes have been done before we read ISR_EL1. On systems without the v8.2 RAS extensions this doesn't give us anything as we can't contain errors, and the ESR bits to describe the severity are all implementation-defined. Replace this with a nop for these systems. Cc: stable@vger.kernel.org # v4.19 Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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